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An acid HA ionizes as HAhArrH^(+)+A^(-) ...

An acid `HA` ionizes as `HAhArrH^(+)+A^(-)` The `pH` of `1.0 M` solution is `5`. Its dissociation constant would be

A

`1xx10^(-10)`

B

5

C

`5xx10^(-8)`

D

`1xx10^(-5)`

Text Solution

Verified by Experts

The correct Answer is:
A
`[H^(+)]=10^(-5)=sqrt(K_(a)C) implies K_(a)=10^(-10)`
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